First ”kilo”meter means 1000 meters
”deci”meter means 10 meters
Notice there are 3 zeros in the kilo
There is one zero in the deci
Ursula hiked 6.5 kilometers, which is 6500 meters (6.5 x 1000)
6500 meters is 65000 decimeters (6500 x 10)
That's the LONG explanation.
The easiest way to get a answer is to simply move the decimal 4 places to the right. (that's one decimal place for each zero in the kilo and deck.
6.5 Moving your decimal --> 4 places is:
65,000.
Hope that helps.